LTC2634HMSE-LZ8#PBF

Overview

The LTC2634HMSE-LZ8#PBF is a quad 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices, housed in a 10-lead MSOP package. It features an integrated precision reference providing a full-scale output of 4.096V and operates on a single 4.5V to 5.5V supply. The device includes rail-to-rail output buffers, double-buffered data latches, and a power-on reset circuit that clears outputs to zero-scale upon initialization. Communication is handled via a 3-wire SPI/MICROWIRE compatible serial interface with clock rates up to 50MHz.

Feature Summary

• Quad 8-bit DACs with integrated 4.096V precision reference
• Rail-to-rail output buffers guaranteed monotonic over -40°C to 125°C
• Power-on reset to zero-scale for consistent system initialization
• 3-wire SPI/MICROWIRE compatible serial interface operating up to 50MHz

Applications

• Process control and industrial automation systems
• Portable battery-powered equipment
• Automotive applications requiring AEC-Q100 qualification
• Automatic test equipment

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and standard tube packaging. Confirm the MSE package designation matches the 10-lead MSOP footprint requirements for the target PCB layout. Ensure the H-grade temperature rating (-40°C to 125°C) aligns with the operational environment constraints.

Selection Notes

Select this part when a quad 8-bit resolution is sufficient for the application, offering lower cost and potentially faster settling times compared to higher-resolution variants. The LZ suffix ensures outputs start at zero volts during power-up, which is critical for protecting downstream circuits sensitive to initial voltage spikes. Verify that the 4.5V minimum supply voltage meets the system's power budget.

Part Context

This component belongs to the LTC2634 family, which offers various resolutions (8, 10, 12 bits), package types (QFN, MSOP), and power-on reset behaviors. The HMSE designation specifically identifies the H-grade automotive temperature range, MSOP package, mid-scale external reference mode capability (though configured here for internal zero-scale reset), and 8-bit resolution.

Replacement Considerations

Direct replacements within the same family include other LTC2634 variants with different resolutions or packages, such as LTC2634HMSI-LZ8#PBF (Industrial grade) or LTC2634HUD-LZ8#PBF (QFN package). Cross-family replacements require matching quad-channel architecture, similar supply voltages, and comparable linearity specifications.